Study Type – Therapy (case series)
Level of Evidence 4
What’s known on the subject? and What does the study add?
Removal of a renal cell carcinoma with a level IV tumour thrombus is a challenging surgery and generally is performed in a tertiary care centre. Performing these cases generally requires a multi-disciplinary approach consisting of urological and vascular/cardiovascular surgeons.
This study sheds light on the high surgical morbidity and mortality of these cases even at experienced centres. For patients requiring cardiopulmonary bypass, approximately 20% may not survive. In these challenging surgeries, deep hypothermic circulatory arrest may limit mortality and further studies should investigate the protective effect of this modality.
• To review experience with nephrectomy/thrombectomy for a renal cell carcimoma (RCC) with a level IV tumour thrombus and to evaluate the benefit of deep hypothermic circulatory arrest (DHCA) with cardiopulmonary bypass (CPBP).
PATIENTS AND METHODS
• A multi-institutional retrospective database was created to assess the outcomes of surgery for RCC and associated level IV tumour thrombus from 1983 to 2007. Patients were identified based on radiographic records/operative findings.
• Only cases using CPBP were analysed. Clinicopathological and operative characteristics including use of DHCA were recorded.
• Overall survival (OS) for all patients and by use of DHCA was assessed. Comparisons of clinical and operative characteristics by use of DHCA were performed.
• A Cox regression model determined predictors of perioperative/in-hospital mortality.
• In all, 63 patients underwent resection with CPBP; overall perioperative mortality was 22.2%.
• There were no significant differences in clinicopathological characteristics, operative duration, estimated blood loss, transfusions, and hospital stay by use of DHCA.
• Perioperative mortality rate was lower in patients undergoing DHCA (8.3% vs 37.5%, P= 0.006).
• The median OS was longer for the patients undergoing DHCA (15.8 vs 7.7 months); however, this failed to reach statistical significance (P= 0.357).
• On multivariate analysis, age of >60 years (hazard ratio [HR] 6.7, 95% confidence interval [CI] 1.5–31.1, P= 0.015) and the use of DHCA (HR 0.13, 95% CI 0.036–0.51, P= 0.003) were independent predictors of perioperative mortality.
• Radical nephrectomy and level IV tumour thrombectomy is associated with significant mortality.
• The use of DHCA does not appear to adversely affect operative characteristics and may limit perioperative mortality.
• Further prospective studies should be performed to confirm the benefit of DHCA.